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    <script src="../libraries/RGraph.common.dynamic.js" ></script>
    <script src="../libraries/RGraph.common.effects.js" ></script>
    <script src="../libraries/RGraph.gauge.js" ></script>
    
    <title>RGraph demo: A customised and adjustable Gauge chart</title>

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    <meta name="description" content="A Gauge chart that is updated periodically by AJAX" />
     
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        <script>
            document.write('<a href="" target="_blank" onclick="window.open(\'https://www.facebook.com/sharer/sharer.php?u=http://www.rgraph.net' + location.pathname + '\', null, \'top=50,left=50,width=600,height=368\'); return false"><img src="../images/facebook-large.png" width="200" height="43" alt="Share on Facebook" border="0" title="Visit the RGraph Facebook page" id="facebook_link" /></a>&nbsp;');
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    <div style="background-color: #ffc; border: 2px solid #cc0; border-radius: 5px; padding: 5px;">
        <b>Note:</b>
        For security reasons the AJAX demos don't work offline. You can view the demos on the RGraph website here:
        <a href="http://www.rgraph.net/demos/" target="_blank" rel="nofollow">http://www.rgraph.net/demos</a>
    </div>

    <h1>A customised Gauge chart (with AJAX updating)</h1>
    
    <p>
        This Gauge is much like the previous one but with AJAX updating instead of click updating. Because
        of the AJAX it only works when viewed online - which you can do <a href="http://www.rgraph.net/demos/gauge-ajax.html" rel="nofollow">here</a>.
    </p>

    <canvas id="cvs" width="250" height="250">[No canvas support]</canvas>
    
    <script>
        window.onload = function ()
        {
            var gauge = new RGraph.Gauge({
                id: 'cvs',
                min:0,
                max: 100,
                value: 7,
                options: {
                    borderOutline: 'transparent',
                    needleColors: ['red'],
                    needleType: 'line',
                    centerpinRadius: 0.1,
                    titleTop: 'Speed',
                    textAccessible: true
                }
            }).on('draw', function (obj)
            {
                var co = obj.context;
    
                // This circle becomes the border of the centerpin
                RGraph.path2(co, ['b', 'a', obj.centerx, obj.centery, 10, 0, RGraph.TWOPI, false, 'f', 'black']);
            })
            .draw();




            var delay = 1500;




            function myAJAXCallback(num)
            {
                gauge.value = num;
                gauge.grow()
                
                
                // Make another AJAX call after the delay (which is in milliseconds)
                setTimeout(function ()
                    {
                        RGraph.AJAX.getNumber('/getdata.html', myAJAXCallback);
                    },
                    delay);
            }




            /**
            * Make the AJAX call every so often (contolled by the delay variable)
            */
            setTimeout(function () {RGraph.AJAX.getNumber('/getdata.html', myAJAXCallback);}, delay);
        };
    </script>





    <p></p>

    This goes in the documents header:
    <pre class="code">
&lt;script src="RGraph.common.core.js"&gt;&lt;/script&gt;
&lt;script src="RGraph.common.dynamic.js"&gt;&lt;/script&gt;
&lt;script src="RGraph.common.effects.js"&gt;&lt;/script&gt;
&lt;script src="RGraph.gauge.js"&gt;&lt;/script&gt;
</pre>
    
    Put this where you want the chart to show up:
    <pre class="code">
&lt;canvas id="cvs" width="250" height="250"&gt;
    [No canvas support]
&lt;/canvas&gt;
</pre>

    This is the code that generates the chart:
    <pre class="code">
&lt;script&gt;
    window.onload = function ()
    {
        var gauge = new RGraph.Gauge({
            id: 'cvs',
            min:0,
            max: 100,
            value: 7,
            options: {
                borderOutline: 'transparent',
                needleColors: ['red'],
                needleType: 'line',
                centerpinRadius: 0.1,
                titleTop: 'Speed',
                labelsOffset: 7,
                textAccessible: true
            }
        }).on('draw', function (obj)
        {
            var co = obj.context;

            <span>// This circle becomes the border of the centerpin</span>
            RGraph.path2(co, ['b', 'a', obj.centerx, obj.centery, 10, 0, RGraph.TWOPI, false, 'f', 'black']);
        })
        .draw();




        var delay = 1500;




        function myAJAXCallback(num)
        {
            gauge.value = num;
            gauge.grow()
            
            
            <span>// Make another AJAX call after the delay (which is in milliseconds)</span>
            setTimeout(function ()
            {
                RGraph.AJAX.getNumber('/getdata.html', myAJAXCallback);
            }, delay);
        }




        <span>/**
        * Make the AJAX call every so often (contolled by the delay variable)
        */</span>
        setTimeout(function ()
        {
            RGraph.AJAX.getNumber('/getdata.html', myAJAXCallback);
        }, delay);
    };
&lt;/script&gt;
</pre>



    
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